@Caleb_Koster11 86.1
Velocity (max)
1/25/26
CLASS OF 2027
RHP
OF
Caleb
Koster
Cajon (HS) • CA
6' 0" • 153LBS
R/R • 16yr 10mo
Travel Team: Stacked
6' 0" • 153LBSR/R • 16yr 10mo
Travel Team: Stacked
Rankings
2027 National
Rankings available to Premium Subscriber
2027 State
Rankings available to Premium Subscriber
Commitment
UNCOMMITTED
Player has made a commitment?
Tell us where
Best Of Stats
Fastball
83.4 - 85.2
Velo Range
1/25/26
1940
Spin Rate (avg)
1/25/26
Changeup
73 - 75
Velo Range
1/25/26
1285
Spin Rate (avg)
1/25/26
Curveball
66.6 - 70
Velo Range
1/25/26
1986
Spin Rate (avg)
1/25/26
85.9
Exit Velocity (max)
1/25/26
78.9
Exit Velocity (avg)
1/25/26
289
Distance (max)
1/25/26
25
Sweet Spot %
1/25/26
22
Hand Speed (max)
1/25/26
68.6
Bat Speed (max)
1/25/26
9.7
Rot. Acc (max)
1/25/26
-
Hard Hit %
6.98
60-yd
1/25/26
3.81
30-yd
1/25/26
1.59
10-yd
1/25/26
19.4
Run speed (max)
1/25/26
-
INF Velo
87
OF Velo
1/25/26
-
C Velo
-
Pop Time
Positional Tools
2026
Sign in to view rankings 
Outfield Velocity
The athlete's maximum throwing velocity from an outfield position in the given event year. Measured in miles per hour (MPH).
87.0
Hitting
2026
Exit Velocity Max
The highest exit velocity of any batted ball in the given event year. Measured in miles per hour (MPH).
85.9
Exit Velocity Avg
Average exit velocity of all batted balls in the given event year. Measured in miles per hour (MPH).
78.9
Distance Max
The highest flight distance of any batted ball in the given event year. Measured in feet (ft).
289
Distance Avg
Average flight distance of all batted balls in the given event year. Measured in feet (ft).
198
Launch Angle Avg
Average launch angle of all batted balls in the given event year. Measured in degrees.
18.2205
Hard Hit %
Percentage of batted balls with exit velocities over 95 MPH in the given event year.
Sweet Spot %
Percentage of batted balls in the given event year with a launch angle between 8° and 32°.
Line Drive %
Percentage of batted balls with launch angles between 10 and 25 degrees in the given event year.
Fly Ball %
Percentage of batted balls with launch angles between 25 and 50 degrees in the given event year.
Ground Ball %
Percentage of batted balls with launch angles below 10 degrees in the given event year.
Inland Empire Preseason ID
Jan 25, 2026
Trackman - Hitting
85.9
Exit Velocity (max)
78.9
Exit Velocity (avg)
198
Distance (avg)
289
Distance (max)
Sweet Spot %
Line Drive %
Fly Ball %
Ground Ball %
Hitting
2026
Hand Speed Max
The highest Peak Hand Speed of any swing in the given event year.
22.0
Hand Speed Avg
The average Peak Hand Speed for all swings in the given event year.
20.9
Bat Speed Max
The highest Bat Speed of any swing in the given event year.
68.6
Bat Speed Avg
The average Bat Speed for all swings in the given event year.
66.8
Rotational Acceleration Max
The highest Rotational Acceleration of any swing in the given event year.
Rotational Acceleration Avg
The average Rotational Acceleration for all swings in the given event year.
On-Plane Efficiency Max
The highest On-Plane Efficiency of any swing in the given event year.
On-Plane Efficiency Avg
The average On-Plane Efficiency for all swings in the given event year.
Inland Empire Preseason ID
Jan 25, 2026
Blast - Hitting
22.0
Hand Speed (max)
20.9
Hand Speed (avg)
68.6
Bat Speed (max)
66.8
Bat Speed (avg)
Rot. Acc (max)
Rot. Acc (avg)
On Plane Eff (avg)
MaxOnPlaneEfficiency
Pitching
2026
Fastball
Velocity Max
The maximum observed fastball velocity in the given event year. Measured in miles per hour (MPH).
86.1
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
84.2
Fastball
Spin Rate Avg
The average rate of spin for all pitches of this type in the given event year. Measured in rotations per minute (RPM).
1940
Fastball
Spin Score Avg
The average Bauer Units value of all fastballs in the given event year. Bauer Units are calculated for each pitch by dividing Spin Rate by Velocity.
23.0
Fastball
Total Movement Avg
The average total non-gravity movement for all pitches of this type in the given event year. Measured in inches (in).
Curveball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
68.3
Curveball
Spin Rate Avg
The average rate of spin for all pitches of this type in the given event year. Measured in rotations per minute (RPM).
1986
Curveball
Total Movement Avg
The average total non-gravity movement for all pitches of this type in the given event year. Measured in inches (in).
Changeup
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
74.1
Changeup
Spin Rate Avg
The average rate of spin for all pitches of this type in the given event year. Measured in rotations per minute (RPM).
1285
Changeup
Total Movement Avg
The average total non-gravity movement for all pitches of this type in the given event year. Measured in inches (in).
Inland Empire Preseason ID
Jan 25, 2026
Trackman - Fastball
86.1
Velocity (max)
83.4 - 85.2
Velo Range
84.3
Eff Velocity (avg)
2,093
Spin Rate (max)
1,940
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Spin Efficiency % (avg)
Trackman - Curveball
70.2
Velocity (max)
66.6 - 70.0
Velo Range
67.6
Eff Velocity (avg)
2,168
Spin Rate (max)
1,986
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Spin Efficiency % (avg)
Trackman - ChangeUp
75.2
Velocity (max)
73.3 - 74.9
Velo Range
74.2
Eff Velocity (avg)
1,426
Spin Rate (max)
1,285
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Spin Efficiency % (avg)
Pitch Scores
2026
Fastball
Hop+
A fastball with hop has a flat approach angle and visually jumps through the zone. When thrown up in the zone, it is more likely to generate a higher swing and miss average. Hop+ of 100 is MLB average.
Fastball
Sink+
A fastball with sink has low backspin and drops through the strike zone. When thrown down in the zone, it is more likely to generate a higher ground ball percentage and lower launch angle. Sink+ of 100 is MLB average.
Fastball
Rise+
A fastball with rise has a high percentage of backspin. When thrown up in the zone, it is more likely to generate a higher fly ball percentage. Rise+ of 100 is MLB average
Curveball
Hammer+
A hammer breaking ball drops vertically with velocity through the zone, or 12-to-6 movement. Hammer+ of 100 is MLB average.
Curveball
Sweep+
A sweeping breaking ball moves horizontally with velocity through the zone. Sweep+ of 100 is MLB average.
Pitching Velos
2026
Fastball
Velocity Max
The maximum observed fastball velocity in the given event year. Measured in miles per hour (MPH).
86.0
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
84.0
Curveball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
68.5
Changeup
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
74.0
Game Performance
2026
10 Yard Dash
The athlete's fastest 0-10-yard split time in the given event year. Measured in seconds.
1.59
30 Yard Dash
The athlete's fastest 0-30-yard split time in the given event year. Measured in seconds.
3.81
60 Yard Dash
The athlete's fastest 0-60-yard time in the given event year. Measured in seconds.
6.98
Top Speed (MPH)
The athlete's fastest split time converted to miles per hour.
Vizual Edge
2026
Edge Score
The highest Edge Score within the given year. Edge Score is a comprehensive score that takes the core-six visual skills into account, providing an assessment of an athlete’s overall visual ability.
68.0
Pitch Ai
Notes
News
Comments
Draft Reports
Contact
Premium Content Area
To unlock contact information, you need to purchase a ScoutPLUS subscription.
Purchase Subscription OR
Login
Physical
2026
Grip Strgth (LH)
Grip strength is a measure of a players bat control and ability to transfer power and speed during impact, measured in pounds of force generated; collected with elbow bent at 90 degrees.
Grip Strgth (RH)
Grip strength is a measure of a players bat control and ability to transfer power and speed during impact, measured in pounds of force generated; collected with elbow bent at 90 degrees.
Positional Profile: RHP/OF Rising junior with wiry frame. As he matures and adds weight / muscle, his current arm action support more velocity growth, and his movement throughout field displayed balance and fluidity. Interesting to see as he matures and defintalty someone to look out for.
Body: 6-0, 153-pounds. Lean and wiry athlete that maintained great balance across the field. With height that supports even more weight and muscle to be added as he matures.
Delivery: High legkick, into deep sink into back leg. Front side creates pull for arm and velocity creation. Hips clear well and front side gets firm and foot is in line with catcher.
Arm Action: RH. Long takeback behind body to 3/4 slot. Action is whippy and body stays close to in line at release point.
FB: T86, 83-85 mph. Some arm side run, best action low and away to righties. T2093, 1940 average rpm.
CB: 67-70 mph. Shows best spin and shape when released later. Sharp when thrown lower in the zone. 1/6 shape. T2168, 1986 average rpm.
CH: 73-75 mph. Present horizontal and vertical movement, with deception from fastball. T1426, 1285 average rpm.
ATH: 6.98 runner in the 60. 1.59 and 3.81 in the 10 and 30 yard splits.
Positional Profile: RHP/OF Rising junior with wiry frame. As he matures and adds weight / muscle, his current arm action support more velocity growth, and his movement throughout field displayed balance and fluidity. Interesting to see as he matures and defintalty someone to look out for.
Body: 6-0, 153-pounds. Lean and wiry athlete that maintained great balance across the field. With height that supports even more weight and muscle to be added as he matures.
Hit: RHH. Square stance with kneees slightly bent. Hands tucked by ear with bat angled just slightly behind head. Uses small leg lift to gain some ground forward. Hands cock with rhythm as they create space away from body, before shooting down and in to create tight rotation against firm front side. Swing is best with 2 handed finish, with neutral bat path. 66.8 mph bat speed with 7 G's of rotational acceleration.
Power: 86 max exit velocity, averaged 78.9 mph. 289' max distance.
Arm: RH. OF-87 mph. Medium takeback into 3/4 slot, firm front side supports aggresive throwing move and loose/whippy arm action. Carry is plenty present for all throws.
Defense: Effective mover who creates good speed through ball. Displayed sureness and comfortability with groundballs throughout.
ATH: 6.98 runner in the 60. 1.59 and 3.81 in the 10 and 30 yard splits.
Vizual Edge: 68 Edge Score